352 citations · 3.6k across the 53 of their papers we have counts for
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astro-ph2007★ 15 cited
A search for CO+ in planetary nebulae
T. A. Bell, W. Whyatt, S. Viti +1
We have carried out a systematic search for the molecular ion CO+ in a sample of 8 protoplanetary and planetary nebulae in order to determine the origin of the unexpectedly strong…
astro-ph2007★ 49 cited
Molecular line intensities as measures of cloud masses - II. Conversion factors for specific galaxy types
T. A. Bell, S. Viti, D. A. Williams
We present theoretically-established values of the CO-to-H2 and C-to-H2 conversion factors that may be used to estimate the gas masses of external galaxies. We consider four distin…
astro-ph2007★ 352 cited
A PDR-Code Comparison Study
M. Roellig, N. P. Abel, T. Bell +21
We present a comparison between independent computer codes, modeling the physics and chemistry of interstellar photon dominated regions (PDRs). Our goal was to understand the mutua…